köszön

Etymology
Probably from a language, related to 🇨🇬. See other related words at 🇨🇬. The Hungarian meaning may derive from the narrowing of the sense “to wish” into “to wish sy. well or blessings”, i.e. on occasion of greeting them or saying them goodbye.

Verb

 * 1)  to greet (someone: ), to say hello
 * 2)  to thank (someone:, for something: )
 * 1)  to thank (someone:, for something: )

Usage notes

 * As shown in the examples, the only grammatical clue to decide the meaning of the verb in a given sentence (aside from context) is to check whether it has an object (the thing being thanked for, indirect object in English), even if it is indefinite or implicit (, definite conjugation [“for it”]).
 * If there is no reference to the thing thanked for, the phrase needs to be used.